XXI Bomber Command

Constituted as XXI Bomber Command on 1 Mar 1944 and activated the same
day. Assigned to Second AF. Moved to the Marianas late in 1944 and,
assigned to Twentieth AF, engaged in very-long-range bombardment
operations until mid-Jul 1945. The history of XXI Bomber Command
terminated on 16 Jul 1945. (On that date Headquarters and Headquarters
Squadron, XXI Bomber Command was redesignated Headquarters Squadron,
Twentieth AF. This redesignation, which brought an end to XXI Bomber
Command as an establishment, had no effect on the lineage of Twentieth
AF.)